What happened
The incident occurred while a student pilot was conducting his first supervised solo flight. During the approach for the second landing, the pilot executed an improper flare, resulting in a hard landing. Following this initial impact, the aircraft bounced off the runway surface.
In an attempt to correct the situation, the pilot overcorrected the control inputs. This action caused the airplane to porpoise three times in succession. The repeated vertical oscillations placed excessive stress on the airframe and landing gear system. Ultimately, the nose landing gear collapsed under the strain of these forces.